199b2450f6
Change all references to stdout/stderr to gdb_stdout/gdb_stderr. Replace all calls to stdio output functions with calls to corresponding _unfiltered functions (`fprintf_unfiltered') Replaced calls to fopen for output to gdb_fopen. Added sufficient goo to utils.c and defs.h to make the above work. The net effect is that stdio output functions are only directly used in utils.c. Elsewhere, the _unfiltered and _filtered functions and GDB_FILE type are used. In the near future, GDB_FILE will stop being equivalant to FILE. The semantics of some commands has changed in a very subtle way: called in the right context, they may cause new occurences of prompt_for_continue() behavior. The testsuite doesn't notice anything like this, though. Please respect this change by not reintroducing stdio output dependencies in the main body of gdb code. All output from commands should go to a GDB_FILE. Target-specific code can still use stdio directly to communicate with targets.
633 lines
14 KiB
C
633 lines
14 KiB
C
/* Serial interface for local (hardwired) serial ports on Un*x like systems
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Copyright 1992, 1993 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "serial.h"
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#include <fcntl.h>
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#include <sys/types.h>
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#if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
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#define HAVE_SGTTY
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#endif
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#ifdef HAVE_TERMIOS
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#include <termios.h>
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#include <unistd.h>
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struct hardwire_ttystate
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{
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struct termios termios;
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};
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#endif /* termios */
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#ifdef HAVE_TERMIO
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#include <termio.h>
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/* It is believed that all systems which have added job control to SVR3
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(e.g. sco) have also added termios. Even if not, trying to figure out
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all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty
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bewildering. So we don't attempt it. */
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struct hardwire_ttystate
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{
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struct termio termio;
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};
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#endif /* termio */
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#ifdef HAVE_SGTTY
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/* Needed for the code which uses select(). We would include <sys/select.h>
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too if it existed on all systems. */
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#include <sys/time.h>
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#include <sgtty.h>
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struct hardwire_ttystate
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{
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struct sgttyb sgttyb;
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struct tchars tc;
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struct ltchars ltc;
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/* Line discipline flags. */
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int lmode;
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};
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#endif /* sgtty */
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static int hardwire_open PARAMS ((serial_t scb, const char *name));
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static void hardwire_raw PARAMS ((serial_t scb));
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static int wait_for PARAMS ((serial_t scb, int timeout));
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static int hardwire_readchar PARAMS ((serial_t scb, int timeout));
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static int rate_to_code PARAMS ((int rate));
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static int hardwire_setbaudrate PARAMS ((serial_t scb, int rate));
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static int hardwire_write PARAMS ((serial_t scb, const char *str, int len));
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/* FIXME: static void hardwire_restore PARAMS ((serial_t scb)); */
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static void hardwire_close PARAMS ((serial_t scb));
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static int get_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state));
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static int set_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state));
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static serial_ttystate hardwire_get_tty_state PARAMS ((serial_t scb));
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static int hardwire_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
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/* Open up a real live device for serial I/O */
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static int
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hardwire_open(scb, name)
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serial_t scb;
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const char *name;
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{
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scb->fd = open (name, O_RDWR);
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if (scb->fd < 0)
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return -1;
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return 0;
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}
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static int
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get_tty_state(scb, state)
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serial_t scb;
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struct hardwire_ttystate *state;
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{
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#ifdef HAVE_TERMIOS
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extern int errno;
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if (tcgetattr(scb->fd, &state->termios) < 0)
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return -1;
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return 0;
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#endif
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#ifdef HAVE_TERMIO
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if (ioctl (scb->fd, TCGETA, &state->termio) < 0)
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return -1;
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return 0;
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#endif
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#ifdef HAVE_SGTTY
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if (ioctl (scb->fd, TIOCGETP, &state->sgttyb) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCGETC, &state->tc) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCGLTC, &state->ltc) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0)
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return -1;
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return 0;
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#endif
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}
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static int
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set_tty_state(scb, state)
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serial_t scb;
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struct hardwire_ttystate *state;
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{
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#ifdef HAVE_TERMIOS
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if (tcsetattr(scb->fd, TCSANOW, &state->termios) < 0)
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return -1;
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return 0;
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#endif
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#ifdef HAVE_TERMIO
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if (ioctl (scb->fd, TCSETA, &state->termio) < 0)
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return -1;
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return 0;
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#endif
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#ifdef HAVE_SGTTY
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if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0)
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return -1;
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return 0;
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#endif
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}
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static serial_ttystate
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hardwire_get_tty_state(scb)
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serial_t scb;
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{
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struct hardwire_ttystate *state;
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state = (struct hardwire_ttystate *)xmalloc(sizeof *state);
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if (get_tty_state(scb, state))
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return NULL;
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return (serial_ttystate)state;
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}
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static int
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hardwire_set_tty_state(scb, ttystate)
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serial_t scb;
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serial_ttystate ttystate;
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{
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struct hardwire_ttystate *state;
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state = (struct hardwire_ttystate *)ttystate;
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return set_tty_state(scb, state);
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}
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static int
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hardwire_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
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serial_t scb;
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serial_ttystate new_ttystate;
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serial_ttystate old_ttystate;
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{
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struct hardwire_ttystate new_state;
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struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate;
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new_state = *(struct hardwire_ttystate *)new_ttystate;
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#ifdef HAVE_TERMIOS
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/* I'm not sure whether this is necessary; the manpage makes no mention
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of discarding input when switching to/from ICANON. */
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if (state->termios.c_lflag & ICANON)
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new_state.termios.c_lflag |= ICANON;
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else
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new_state.termios.c_lflag &= ~ICANON;
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#endif
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#ifdef HAVE_TERMIO
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/* I'm not sure whether this is necessary; the manpage makes no mention
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of discarding input when switching to/from ICANON. */
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if (state->termio.c_lflag & ICANON)
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new_state.termio.c_lflag |= ICANON;
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else
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new_state.termio.c_lflag &= ~ICANON;
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#endif
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#ifdef HAVE_SGTTY
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if (state->sgttyb.sg_flags & RAW)
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new_state.sgttyb.sg_flags |= RAW;
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else
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new_state.sgttyb.sg_flags &= ~RAW;
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/* I'm not sure whether this is necessary; the manpage just mentions
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RAW not CBREAK. */
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if (state->sgttyb.sg_flags & CBREAK)
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new_state.sgttyb.sg_flags |= CBREAK;
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else
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new_state.sgttyb.sg_flags &= ~CBREAK;
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#endif
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return set_tty_state (scb, &new_state);
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}
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static void
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hardwire_print_tty_state (scb, ttystate)
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serial_t scb;
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serial_ttystate ttystate;
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{
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struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
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int i;
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#ifdef HAVE_TERMIOS
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printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
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state->termios.c_iflag, state->termios.c_oflag);
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printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x\n",
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state->termios.c_cflag, state->termios.c_lflag);
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#if 0
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/* This not in POSIX, and is not really documented by those systems
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which have it (at least not Sun). */
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printf_filtered ("c_line = 0x%x.\n", state->termios.c_line);
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#endif
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printf_filtered ("c_cc: ");
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for (i = 0; i < NCCS; i += 1)
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printf_filtered ("0x%x ", state->termios.c_cc[i]);
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printf_filtered ("\n");
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#endif
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#ifdef HAVE_TERMIO
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printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
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state->termio.c_iflag, state->termio.c_oflag);
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printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
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state->termio.c_cflag, state->termio.c_lflag,
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state->termio.c_line);
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printf_filtered ("c_cc: ");
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for (i = 0; i < NCC; i += 1)
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printf_filtered ("0x%x ", state->termio.c_cc[i]);
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printf_filtered ("\n");
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#endif
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#ifdef HAVE_SGTTY
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printf_filtered ("sgttyb.sg_flags = 0x%x.\n", state->sgttyb.sg_flags);
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printf_filtered ("tchars: ");
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for (i = 0; i < (int)sizeof (struct tchars); i++)
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printf_filtered ("0x%x ", ((unsigned char *)&state->tc)[i]);
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printf_filtered ("\n");
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printf_filtered ("ltchars: ");
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for (i = 0; i < (int)sizeof (struct ltchars); i++)
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printf_filtered ("0x%x ", ((unsigned char *)&state->ltc)[i]);
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printf_filtered ("\n");
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printf_filtered ("lmode: 0x%x\n", state->lmode);
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#endif
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}
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static int
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hardwire_flush_output (scb)
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serial_t scb;
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{
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#ifdef HAVE_TERMIOS
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return tcflush (scb->fd, TCOFLUSH);
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#endif
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#ifdef HAVE_TERMIO
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return ioctl (scb->fd, TCFLSH, 1);
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#endif
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#ifdef HAVE_SGTTY
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/* This flushes both input and output, but we can't do better. */
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return ioctl (scb->fd, TIOCFLUSH, 0);
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#endif
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}
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static int
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hardwire_flush_input (scb)
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serial_t scb;
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{
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#ifdef HAVE_TERMIOS
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return tcflush (scb->fd, TCIFLUSH);
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#endif
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#ifdef HAVE_TERMIO
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return ioctl (scb->fd, TCFLSH, 0);
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#endif
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#ifdef HAVE_SGTTY
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/* This flushes both input and output, but we can't do better. */
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return ioctl (scb->fd, TIOCFLUSH, 0);
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#endif
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}
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static int
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hardwire_send_break (scb)
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serial_t scb;
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{
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#ifdef HAVE_TERMIOS
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return tcsendbreak (scb->fd, 0);
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#endif
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#ifdef HAVE_TERMIO
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return ioctl (scb->fd, TCSBRK, 0);
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#endif
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#ifdef HAVE_SGTTY
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{
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int status;
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struct timeval timeout;
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status = ioctl (scb->fd, TIOCSBRK, 0);
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/* Can't use usleep; it doesn't exist in BSD 4.2. */
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/* Note that if this select() is interrupted by a signal it will not wait
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the full length of time. I think that is OK. */
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timeout.tv_sec = 0;
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timeout.tv_usec = 250000;
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select (0, 0, 0, 0, &timeout);
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status = ioctl (scb->fd, TIOCCBRK, 0);
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return status;
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}
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#endif
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}
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static void
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hardwire_raw(scb)
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serial_t scb;
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{
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struct hardwire_ttystate state;
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if (get_tty_state(scb, &state))
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fprintf_unfiltered(gdb_stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
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#ifdef HAVE_TERMIOS
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state.termios.c_iflag = 0;
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state.termios.c_oflag = 0;
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state.termios.c_lflag = 0;
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state.termios.c_cflag &= ~(CSIZE|PARENB);
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state.termios.c_cflag |= CS8;
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state.termios.c_cc[VMIN] = 0;
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state.termios.c_cc[VTIME] = 0;
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#endif
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#ifdef HAVE_TERMIO
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state.termio.c_iflag = 0;
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state.termio.c_oflag = 0;
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state.termio.c_lflag = 0;
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state.termio.c_cflag &= ~(CSIZE|PARENB);
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state.termio.c_cflag |= CS8;
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state.termio.c_cc[VMIN] = 0;
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state.termio.c_cc[VTIME] = 0;
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#endif
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#ifdef HAVE_SGTTY
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state.sgttyb.sg_flags |= RAW | ANYP;
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state.sgttyb.sg_flags &= ~(CBREAK | ECHO);
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#endif
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scb->current_timeout = 0;
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if (set_tty_state (scb, &state))
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fprintf_unfiltered(gdb_stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
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}
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/* Wait for input on scb, with timeout seconds. Returns 0 on success,
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otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
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For termio{s}, we actually just setup VTIME if necessary, and let the
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timeout occur in the read() in hardwire_read().
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*/
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static int
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wait_for(scb, timeout)
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serial_t scb;
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int timeout;
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{
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#ifdef HAVE_SGTTY
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struct timeval tv;
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fd_set readfds;
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FD_ZERO (&readfds);
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tv.tv_sec = timeout;
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tv.tv_usec = 0;
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FD_SET(scb->fd, &readfds);
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while (1)
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{
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int numfds;
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if (timeout >= 0)
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numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
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else
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numfds = select(scb->fd+1, &readfds, 0, 0, 0);
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if (numfds <= 0)
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if (numfds == 0)
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return SERIAL_TIMEOUT;
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else if (errno == EINTR)
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continue;
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else
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return SERIAL_ERROR; /* Got an error from select or poll */
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return 0;
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}
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#endif /* HAVE_SGTTY */
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#if defined HAVE_TERMIO || defined HAVE_TERMIOS
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if (timeout == scb->current_timeout)
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return 0;
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{
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struct hardwire_ttystate state;
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if (get_tty_state(scb, &state))
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fprintf_unfiltered(gdb_stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
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#ifdef HAVE_TERMIOS
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state.termios.c_cc[VTIME] = timeout * 10;
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#endif
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#ifdef HAVE_TERMIO
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state.termio.c_cc[VTIME] = timeout * 10;
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#endif
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scb->current_timeout = timeout;
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if (set_tty_state (scb, &state))
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fprintf_unfiltered(gdb_stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
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return 0;
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}
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#endif /* HAVE_TERMIO || HAVE_TERMIOS */
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}
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/* Read a character with user-specified timeout. TIMEOUT is number of seconds
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to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
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char if successful. Returns SERIAL_TIMEOUT if timeout expired, EOF if line
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dropped dead, or SERIAL_ERROR for any other error (see errno in that case). */
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static int
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hardwire_readchar(scb, timeout)
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serial_t scb;
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int timeout;
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{
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int status;
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if (scb->bufcnt-- > 0)
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return *scb->bufp++;
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status = wait_for(scb, timeout);
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if (status < 0)
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return status;
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scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
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if (scb->bufcnt <= 0)
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if (scb->bufcnt == 0)
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return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
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distinguish between EOF & timeouts
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someday] */
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else
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return SERIAL_ERROR; /* Got an error from read */
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scb->bufcnt--;
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scb->bufp = scb->buf;
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return *scb->bufp++;
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}
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#ifndef B19200
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#define B19200 EXTA
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#endif
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#ifndef B38400
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#define B38400 EXTB
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#endif
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/* Translate baud rates from integers to damn B_codes. Unix should
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have outgrown this crap years ago, but even POSIX wouldn't buck it. */
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static struct
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{
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int rate;
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int code;
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}
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baudtab[] =
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{
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{50, B50},
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|
{75, B75},
|
|
{110, B110},
|
|
{134, B134},
|
|
{150, B150},
|
|
{200, B200},
|
|
{300, B300},
|
|
{600, B600},
|
|
{1200, B1200},
|
|
{1800, B1800},
|
|
{2400, B2400},
|
|
{4800, B4800},
|
|
{9600, B9600},
|
|
{19200, B19200},
|
|
{38400, B38400},
|
|
{-1, -1},
|
|
};
|
|
|
|
static int
|
|
rate_to_code(rate)
|
|
int rate;
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; baudtab[i].rate != -1; i++)
|
|
if (rate == baudtab[i].rate)
|
|
return baudtab[i].code;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
hardwire_setbaudrate(scb, rate)
|
|
serial_t scb;
|
|
int rate;
|
|
{
|
|
struct hardwire_ttystate state;
|
|
|
|
if (get_tty_state(scb, &state))
|
|
return -1;
|
|
|
|
#ifdef HAVE_TERMIOS
|
|
cfsetospeed (&state.termios, rate_to_code (rate));
|
|
cfsetispeed (&state.termios, rate_to_code (rate));
|
|
#endif
|
|
|
|
#ifdef HAVE_TERMIO
|
|
#ifndef CIBAUD
|
|
#define CIBAUD CBAUD
|
|
#endif
|
|
|
|
state.termio.c_cflag &= ~(CBAUD | CIBAUD);
|
|
state.termio.c_cflag |= rate_to_code (rate);
|
|
#endif
|
|
|
|
#ifdef HAVE_SGTTY
|
|
state.sgttyb.sg_ispeed = rate_to_code (rate);
|
|
state.sgttyb.sg_ospeed = rate_to_code (rate);
|
|
#endif
|
|
|
|
return set_tty_state (scb, &state);
|
|
}
|
|
|
|
static int
|
|
hardwire_write(scb, str, len)
|
|
serial_t scb;
|
|
const char *str;
|
|
int len;
|
|
{
|
|
int cc;
|
|
|
|
while (len > 0)
|
|
{
|
|
cc = write(scb->fd, str, len);
|
|
|
|
if (cc < 0)
|
|
return 1;
|
|
len -= cc;
|
|
str += cc;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
hardwire_close(scb)
|
|
serial_t scb;
|
|
{
|
|
if (scb->fd < 0)
|
|
return;
|
|
|
|
close(scb->fd);
|
|
scb->fd = -1;
|
|
}
|
|
|
|
static struct serial_ops hardwire_ops =
|
|
{
|
|
"hardwire",
|
|
0,
|
|
hardwire_open,
|
|
hardwire_close,
|
|
hardwire_readchar,
|
|
hardwire_write,
|
|
hardwire_flush_output,
|
|
hardwire_flush_input,
|
|
hardwire_send_break,
|
|
hardwire_raw,
|
|
hardwire_get_tty_state,
|
|
hardwire_set_tty_state,
|
|
hardwire_print_tty_state,
|
|
hardwire_noflush_set_tty_state,
|
|
hardwire_setbaudrate,
|
|
};
|
|
|
|
void
|
|
_initialize_ser_hardwire ()
|
|
{
|
|
serial_add_interface (&hardwire_ops);
|
|
}
|